:orphan:

.. title:: CONFIG_BT_CTLR_FAST_ENC

.. kconfig:: CONFIG_BT_CTLR_FAST_ENC

CONFIG_BT_CTLR_FAST_ENC
#######################

*Fast Encryption Setup*

Type: ``bool``

Help
====

.. code-block:: none

    Enable connection encryption setup in 3 connection intervals.
    Peripheral will respond to Encryption Request with Encryption Response
    in the same connection interval, and also, will respond with Start
    Encryption Response PDU in the 3rd connection interval, hence
    completing encryption setup in 3 connection intervals. Encrypted data
    would be transmitted as fast as in 3rd connection interval from the
    connection establishment.
    Maximum CPU time in Radio ISR will increase if this feature is
    selected.

Direct dependencies
===================

\ :kconfig:`BT_CTLR_LE_ENC <CONFIG_BT_CTLR_LE_ENC>` && \ :kconfig:`BT_CONN <CONFIG_BT_CONN>` && \ :kconfig:`BT_LL_SW_SPLIT <CONFIG_BT_LL_SW_SPLIT>` && \ :kconfig:`BT_CTLR <CONFIG_BT_CTLR>` && \ :kconfig:`BT_HCI <CONFIG_BT_HCI>` && \ :kconfig:`BT <CONFIG_BT>`

*(Includes any dependencies from ifs and menus.)*

Default
=======

- y if \ :kconfig:`BT_HCI_RAW <CONFIG_BT_HCI_RAW>`

Kconfig definition
==================



At ``<Zephyr Subsystem>/bluetooth/controller/Kconfig.ll_sw_split:426``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:44`` → ``<Zephyr Subsystem>/Kconfig:9`` → ``<Zephyr Subsystem>/bluetooth/Kconfig:175`` → ``<Zephyr Subsystem>/bluetooth/controller/Kconfig:659``

Menu path: (Top) → Sub Systems and OS Services → Bluetooth → Bluetooth Controller → Advanced features

.. code-block:: kconfig

    config BT_CTLR_FAST_ENC
    	bool "Fast Encryption Setup" if BT_CTLR_ADVANCED_FEATURES
    	default y if BT_HCI_RAW
    	depends on BT_CTLR_LE_ENC && BT_CONN && BT_LL_SW_SPLIT && BT_CTLR && BT_HCI && BT
    	help
    	  Enable connection encryption setup in 3 connection intervals.
    	  Peripheral will respond to Encryption Request with Encryption Response
    	  in the same connection interval, and also, will respond with Start
    	  Encryption Response PDU in the 3rd connection interval, hence
    	  completing encryption setup in 3 connection intervals. Encrypted data
    	  would be transmitted as fast as in 3rd connection interval from the
    	  connection establishment.
    	  Maximum CPU time in Radio ISR will increase if this feature is
    	  selected.

*(The 'depends on' condition includes propagated dependencies from ifs and menus.)*